Dynamical symmetry breaking in transport through molecules

Abstract

We analyze the interplay between vibrational and electronic degrees of freedom in charge transport across a molecular single-electron transistor. We focus on the wide class of molecules which possess quasi-degenerate vibrational eigenstates, while no degeneracy occurs for their anionic configuration. We show that the combined effect of a thermal environment and coupling to leads, involving tunneling events charging and discharging the molecule, leads to a dynamical symmetry breaking where quasi-degenerate eigenstates acquire different occupations. This imbalance gives rise to a characteristic asymmetry of the current versus an applied gate voltage.

4 pages, 2 figures, revised final published version

References in corpus (7)

• Dependence of Single Molecule Junction Conductance on Molecular Conformation
• Franck-Condon blockade and giant Fano factors in transport through single molecules
• Phonon effects in molecular transistors: Quantum and classical treatment
• Shuttle Mechanism for Charge Transfer in Coulomb Blockade Nanostructures
• Vibrational sidebands and dissipative tunneling in molecular transistors
• Quantum Shuttle in Phase Space
• Charge transport through a flexible molecular junction

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